[people/ms/u-boot.git] / disk / part_dos.c

/*
 * (C) Copyright 2001
 * Raymond Lo, lo@routefree.com
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * Support for harddisk partitions.
 *
 * To be compatible with LinuxPPC and Apple we use the standard Apple
 * SCSI disk partitioning scheme. For more information see:
 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
 */

#include <common.h>
#include <command.h>
#include <ide.h>
#include <memalign.h>
#include "part_dos.h"

#ifdef CONFIG_HAVE_BLOCK_DEVICE

#define DOS_PART_DEFAULT_SECTOR 512

/* Convert char[4] in little endian format to the host format integer
 */
static inline unsigned int le32_to_int(unsigned char *le32)
{
    return ((le32[3] << 24) +
	    (le32[2] << 16) +
	    (le32[1] << 8) +
	     le32[0]
	   );
}

static inline int is_extended(int part_type)
{
    return (part_type == 0x5 ||
	    part_type == 0xf ||
	    part_type == 0x85);
}

static inline int is_bootable(dos_partition_t *p)
{
	return (p->sys_ind == 0xef) || (p->boot_ind == 0x80);
}

static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
			   int part_num, unsigned int disksig)
{
	lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
	lbaint_t lba_size  = le32_to_int (p->size4);

	printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
		"u\t%08x-%02x\t%02x%s%s\n",
		part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
		(is_extended(p->sys_ind) ? " Extd" : ""),
		(is_bootable(p) ? " Boot" : ""));
}

static int test_block_type(unsigned char *buffer)
{
	int slot;
	struct dos_partition *p;

	if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
	    (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
		return (-1);
	} /* no DOS Signature at all */
	p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET];
	for (slot = 0; slot < 3; slot++) {
		if (p->boot_ind != 0 && p->boot_ind != 0x80) {
			if (!slot &&
			    (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
				     "FAT", 3) == 0 ||
			     strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
				     "FAT32", 5) == 0)) {
				return DOS_PBR; /* is PBR */
			} else {
				return -1;
			}
		}
	}
	return DOS_MBR;	    /* Is MBR */
}


static int part_test_dos(struct blk_desc *dev_desc)
{
#ifndef CONFIG_SPL_BUILD
	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, 1);

	if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
		return -1;

	if (test_block_type((unsigned char *)mbr) != DOS_MBR)
		return -1;

	if (dev_desc->sig_type == SIG_TYPE_NONE &&
	    mbr->unique_mbr_signature != 0) {
		dev_desc->sig_type = SIG_TYPE_MBR;
		dev_desc->mbr_sig = mbr->unique_mbr_signature;
	}
#else
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);

	if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
		return -1;

	if (test_block_type(buffer) != DOS_MBR)
		return -1;
#endif

	return 0;
}

/*  Print a partition that is relative to its Extended partition table
 */
static void print_partition_extended(struct blk_desc *dev_desc,
				     lbaint_t ext_part_sector,
				     lbaint_t relative,
				     int part_num, unsigned int disksig)
{
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	dos_partition_t *pt;
	int i;

	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
		printf ("** Can't read partition table on %d:" LBAFU " **\n",
			dev_desc->devnum, ext_part_sector);
		return;
	}
	i=test_block_type(buffer);
	if (i != DOS_MBR) {
		printf ("bad MBR sector signature 0x%02x%02x\n",
			buffer[DOS_PART_MAGIC_OFFSET],
			buffer[DOS_PART_MAGIC_OFFSET + 1]);
		return;
	}

	if (!ext_part_sector)
		disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);

	/* Print all primary/logical partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		/*
		 * fdisk does not show the extended partitions that
		 * are not in the MBR
		 */

		if ((pt->sys_ind != 0) &&
		    (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
			print_one_part(pt, ext_part_sector, part_num, disksig);
		}

		/* Reverse engr the fdisk part# assignment rule! */
		if ((ext_part_sector == 0) ||
		    (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
			part_num++;
		}
	}

	/* Follows the extended partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		if (is_extended (pt->sys_ind)) {
			lbaint_t lba_start
				= le32_to_int (pt->start4) + relative;

			print_partition_extended(dev_desc, lba_start,
				ext_part_sector == 0  ? lba_start : relative,
				part_num, disksig);
		}
	}

	return;
}


/*  Print a partition that is relative to its Extended partition table
 */
static int part_get_info_extended(struct blk_desc *dev_desc,
				  lbaint_t ext_part_sector, lbaint_t relative,
				  int part_num, int which_part,
				  disk_partition_t *info, unsigned int disksig)
{
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	dos_partition_t *pt;
	int i;
	int dos_type;

	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
		printf ("** Can't read partition table on %d:" LBAFU " **\n",
			dev_desc->devnum, ext_part_sector);
		return -1;
	}
	if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
		buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
		printf ("bad MBR sector signature 0x%02x%02x\n",
			buffer[DOS_PART_MAGIC_OFFSET],
			buffer[DOS_PART_MAGIC_OFFSET + 1]);
		return -1;
	}

#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
	if (!ext_part_sector)
		disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
#endif

	/* Print all primary/logical partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		/*
		 * fdisk does not show the extended partitions that
		 * are not in the MBR
		 */
		if (((pt->boot_ind & ~0x80) == 0) &&
		    (pt->sys_ind != 0) &&
		    (part_num == which_part) &&
		    (ext_part_sector == 0 || is_extended(pt->sys_ind) == 0)) {
			info->blksz = DOS_PART_DEFAULT_SECTOR;
			info->start = (lbaint_t)(ext_part_sector +
					le32_to_int(pt->start4));
			info->size  = (lbaint_t)le32_to_int(pt->size4);
			part_set_generic_name(dev_desc, part_num,
					      (char *)info->name);
			/* sprintf(info->type, "%d, pt->sys_ind); */
			strcpy((char *)info->type, "U-Boot");
			info->bootable = is_bootable(pt);
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
			sprintf(info->uuid, "%08x-%02x", disksig, part_num);
#endif
			info->sys_ind = pt->sys_ind;
			return 0;
		}

		/* Reverse engr the fdisk part# assignment rule! */
		if ((ext_part_sector == 0) ||
		    (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
			part_num++;
		}
	}

	/* Follows the extended partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		if (is_extended (pt->sys_ind)) {
			lbaint_t lba_start
				= le32_to_int (pt->start4) + relative;

			return part_get_info_extended(dev_desc, lba_start,
				 ext_part_sector == 0 ? lba_start : relative,
				 part_num, which_part, info, disksig);
		}
	}

	/* Check for DOS PBR if no partition is found */
	dos_type = test_block_type(buffer);

	if (dos_type == DOS_PBR) {
		info->start = 0;
		info->size = dev_desc->lba;
		info->blksz = DOS_PART_DEFAULT_SECTOR;
		info->bootable = 0;
		strcpy((char *)info->type, "U-Boot");
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
		info->uuid[0] = 0;
#endif
		return 0;
	}

	return -1;
}

void part_print_dos(struct blk_desc *dev_desc)
{
	printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
	print_partition_extended(dev_desc, 0, 0, 1, 0);
}

int part_get_info_dos(struct blk_desc *dev_desc, int part,
		      disk_partition_t *info)
{
	return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
}

int is_valid_dos_buf(void *buf)
{
	return test_block_type(buf) == DOS_MBR ? 0 : -1;
}

int write_mbr_partition(struct blk_desc *dev_desc, void *buf)
{
	if (is_valid_dos_buf(buf))
		return -1;

	/* write MBR */
	if (blk_dwrite(dev_desc, 0, 1, buf) != 1) {
		printf("%s: failed writing '%s' (1 blks at 0x0)\n",
		       __func__, "MBR");
		return 1;
	}

	return 0;
}

U_BOOT_PART_TYPE(dos) = {
	.name		= "DOS",
	.part_type	= PART_TYPE_DOS,
	.max_entries	= DOS_ENTRY_NUMBERS,
	.get_info	= part_get_info_ptr(part_get_info_dos),
	.print		= part_print_ptr(part_print_dos),
	.test		= part_test_dos,
};

#endif
Commit	Line	Data
	1	/*
	2	* (C) Copyright 2001
	3	* Raymond Lo, lo@routefree.com
	4	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	5	*
	6	* SPDX-License-Identifier: GPL-2.0+
	7	*/
	8
	9	/*
	10	* Support for harddisk partitions.
	11	*
	12	* To be compatible with LinuxPPC and Apple we use the standard Apple
	13	* SCSI disk partitioning scheme. For more information see:
	14	* http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
	15	*/
	16
	17	#include <common.h>
	18	#include <command.h>
	19	#include <ide.h>
	20	#include <memalign.h>
	21	#include "part_dos.h"
	22
	23	#ifdef CONFIG_HAVE_BLOCK_DEVICE
	24
	25	#define DOS_PART_DEFAULT_SECTOR 512
	26
	27	/* Convert char[4] in little endian format to the host format integer
	28	*/
	29	static inline unsigned int le32_to_int(unsigned char *le32)
	30	{
	31	return ((le32[3] << 24) +
	32	(le32[2] << 16) +
	33	(le32[1] << 8) +
	34	le32[0]
	35	);
	36	}
	37
	38	static inline int is_extended(int part_type)
	39	{
	40	return (part_type == 0x5 \|\|
	41	part_type == 0xf \|\|
	42	part_type == 0x85);
	43	}
	44
	45	static inline int is_bootable(dos_partition_t *p)
	46	{
	47	return (p->sys_ind == 0xef) \|\| (p->boot_ind == 0x80);
	48	}
	49
	50	static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
	51	int part_num, unsigned int disksig)
	52	{
	53	lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
	54	lbaint_t lba_size = le32_to_int (p->size4);
	55
	56	printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
	57	"u\t%08x-%02x\t%02x%s%s\n",
	58	part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
	59	(is_extended(p->sys_ind) ? " Extd" : ""),
	60	(is_bootable(p) ? " Boot" : ""));
	61	}
	62
	63	static int test_block_type(unsigned char *buffer)
	64	{
	65	int slot;
	66	struct dos_partition *p;
	67
	68	if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) \|\|
	69	(buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
	70	return (-1);
	71	} /* no DOS Signature at all */
	72	p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET];
	73	for (slot = 0; slot < 3; slot++) {
	74	if (p->boot_ind != 0 && p->boot_ind != 0x80) {
	75	if (!slot &&
	76	(strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
	77	"FAT", 3) == 0 \|\|
	78	strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
	79	"FAT32", 5) == 0)) {
	80	return DOS_PBR; /* is PBR */
	81	} else {
	82	return -1;
	83	}
	84	}
	85	}
	86	return DOS_MBR; /* Is MBR */
	87	}
	88
	89
	90	static int part_test_dos(struct blk_desc *dev_desc)
	91	{
	92	#ifndef CONFIG_SPL_BUILD
	93	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, 1);
	94
	95	if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
	96	return -1;
	97
	98	if (test_block_type((unsigned char *)mbr) != DOS_MBR)
	99	return -1;
	100
	101	if (dev_desc->sig_type == SIG_TYPE_NONE &&
	102	mbr->unique_mbr_signature != 0) {
	103	dev_desc->sig_type = SIG_TYPE_MBR;
	104	dev_desc->mbr_sig = mbr->unique_mbr_signature;
	105	}
	106	#else
	107	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	108
	109	if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
	110	return -1;
	111
	112	if (test_block_type(buffer) != DOS_MBR)
	113	return -1;
	114	#endif
	115
	116	return 0;
	117	}
	118
	119	/* Print a partition that is relative to its Extended partition table
	120	*/
	121	static void print_partition_extended(struct blk_desc *dev_desc,
	122	lbaint_t ext_part_sector,
	123	lbaint_t relative,
	124	int part_num, unsigned int disksig)
	125	{
	126	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	127	dos_partition_t *pt;
	128	int i;
	129
	130	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
	131	printf (" Can't read partition table on %d:" LBAFU " \n",
	132	dev_desc->devnum, ext_part_sector);
	133	return;
	134	}
	135	i=test_block_type(buffer);
	136	if (i != DOS_MBR) {
	137	printf ("bad MBR sector signature 0x%02x%02x\n",
	138	buffer[DOS_PART_MAGIC_OFFSET],
	139	buffer[DOS_PART_MAGIC_OFFSET + 1]);
	140	return;
	141	}
	142
	143	if (!ext_part_sector)
	144	disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
	145
	146	/* Print all primary/logical partitions */
	147	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	148	for (i = 0; i < 4; i++, pt++) {
	149	/*
	150	* fdisk does not show the extended partitions that
	151	* are not in the MBR
	152	*/
	153
	154	if ((pt->sys_ind != 0) &&
	155	(ext_part_sector == 0 \|\| !is_extended (pt->sys_ind)) ) {
	156	print_one_part(pt, ext_part_sector, part_num, disksig);
	157	}
	158
	159	/* Reverse engr the fdisk part# assignment rule! */
	160	if ((ext_part_sector == 0) \|\|
	161	(pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
	162	part_num++;
	163	}
	164	}
	165
	166	/* Follows the extended partitions */
	167	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	168	for (i = 0; i < 4; i++, pt++) {
	169	if (is_extended (pt->sys_ind)) {
	170	lbaint_t lba_start
	171	= le32_to_int (pt->start4) + relative;
	172
	173	print_partition_extended(dev_desc, lba_start,
	174	ext_part_sector == 0 ? lba_start : relative,
	175	part_num, disksig);
	176	}
	177	}
	178
	179	return;
	180	}
	181
	182
	183	/* Print a partition that is relative to its Extended partition table
	184	*/
	185	static int part_get_info_extended(struct blk_desc *dev_desc,
	186	lbaint_t ext_part_sector, lbaint_t relative,
	187	int part_num, int which_part,
	188	disk_partition_t *info, unsigned int disksig)
	189	{
	190	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	191	dos_partition_t *pt;
	192	int i;
	193	int dos_type;
	194
	195	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
	196	printf (" Can't read partition table on %d:" LBAFU " \n",
	197	dev_desc->devnum, ext_part_sector);
	198	return -1;
	199	}
	200	if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 \|\|
	201	buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
	202	printf ("bad MBR sector signature 0x%02x%02x\n",
	203	buffer[DOS_PART_MAGIC_OFFSET],
	204	buffer[DOS_PART_MAGIC_OFFSET + 1]);
	205	return -1;
	206	}
	207
	208	#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
	209	if (!ext_part_sector)
	210	disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
	211	#endif
	212
	213	/* Print all primary/logical partitions */
	214	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	215	for (i = 0; i < 4; i++, pt++) {
	216	/*
	217	* fdisk does not show the extended partitions that
	218	* are not in the MBR
	219	*/
	220	if (((pt->boot_ind & ~0x80) == 0) &&
	221	(pt->sys_ind != 0) &&
	222	(part_num == which_part) &&
	223	(ext_part_sector == 0 \|\| is_extended(pt->sys_ind) == 0)) {
	224	info->blksz = DOS_PART_DEFAULT_SECTOR;
	225	info->start = (lbaint_t)(ext_part_sector +
	226	le32_to_int(pt->start4));
	227	info->size = (lbaint_t)le32_to_int(pt->size4);
	228	part_set_generic_name(dev_desc, part_num,
	229	(char *)info->name);
	230	/* sprintf(info->type, "%d, pt->sys_ind); */
	231	strcpy((char *)info->type, "U-Boot");
	232	info->bootable = is_bootable(pt);
	233	#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
	234	sprintf(info->uuid, "%08x-%02x", disksig, part_num);
	235	#endif
	236	info->sys_ind = pt->sys_ind;
	237	return 0;
	238	}
	239
	240	/* Reverse engr the fdisk part# assignment rule! */
	241	if ((ext_part_sector == 0) \|\|
	242	(pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
	243	part_num++;
	244	}
	245	}
	246
	247	/* Follows the extended partitions */
	248	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	249	for (i = 0; i < 4; i++, pt++) {
	250	if (is_extended (pt->sys_ind)) {
	251	lbaint_t lba_start
	252	= le32_to_int (pt->start4) + relative;
	253
	254	return part_get_info_extended(dev_desc, lba_start,
	255	ext_part_sector == 0 ? lba_start : relative,
	256	part_num, which_part, info, disksig);
	257	}
	258	}
	259
	260	/* Check for DOS PBR if no partition is found */
	261	dos_type = test_block_type(buffer);
	262
	263	if (dos_type == DOS_PBR) {
	264	info->start = 0;
	265	info->size = dev_desc->lba;
	266	info->blksz = DOS_PART_DEFAULT_SECTOR;
	267	info->bootable = 0;
	268	strcpy((char *)info->type, "U-Boot");
	269	#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
	270	info->uuid[0] = 0;
	271	#endif
	272	return 0;
	273	}
	274
	275	return -1;
	276	}
	277
	278	void part_print_dos(struct blk_desc *dev_desc)
	279	{
	280	printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
	281	print_partition_extended(dev_desc, 0, 0, 1, 0);
	282	}
	283
	284	int part_get_info_dos(struct blk_desc *dev_desc, int part,
	285	disk_partition_t *info)
	286	{
	287	return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
	288	}
	289
	290	int is_valid_dos_buf(void *buf)
	291	{
	292	return test_block_type(buf) == DOS_MBR ? 0 : -1;
	293	}
	294
	295	int write_mbr_partition(struct blk_desc dev_desc, void buf)
	296	{
	297	if (is_valid_dos_buf(buf))
	298	return -1;
	299
	300	/* write MBR */
	301	if (blk_dwrite(dev_desc, 0, 1, buf) != 1) {
	302	printf("%s: failed writing '%s' (1 blks at 0x0)\n",
	303	__func__, "MBR");
	304	return 1;
	305	}
	306
	307	return 0;
	308	}
	309
	310	U_BOOT_PART_TYPE(dos) = {
	311	.name = "DOS",
	312	.part_type = PART_TYPE_DOS,
	313	.max_entries = DOS_ENTRY_NUMBERS,
	314	.get_info = part_get_info_ptr(part_get_info_dos),
	315	.print = part_print_ptr(part_print_dos),
	316	.test = part_test_dos,
	317	};
	318
	319	#endif